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Fix memory unaligned access issue
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TF-M build with AN519 image can crash due to memory unaligned access:

  • The shared data b/w boot loader and runtime SW is stored in TLV format.
  • The length of a TLV entry can be arbitrary. The TLVs are packed there is no padding between them. Therefore the start address of a TLV entry can be on an odd address in the memory.
  • Pointer referencing on unaligned memory can cause an unaligned access usage fault such an architectures, which are not supporting unaligned access.